Issue using CDT and Online Monitoring with HTTPS

Symptoms

Launching CDT or Online Monitoring with HTTPS causes crash on Windows Server 2022.

Reason

Sinch Contact Pro webclient module does not support HTTP/2 which is enabled by default in IIS 10 (Windows Server 2022).

Solution

Disable HTTP/2 for HTTPS binding:

1. Open IIS Manager on the server.
2. Navigate to the website where CDT and Online Monitoring are served from.
3. On the right side pane, click Bindings.
4. Select row with type https.
5. Click Edit.
6. Click Disable HTTP/2.
7. Click OK.